Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
arna
←
Catalan
apiari
(link)
←
Catalan
arnot
(link)
←
Catalan
eruga
(link)
←
Catalan
papallona
(link)
←
Catalan
sarna
(mention)
←
Catalan
s'
(mention)
←
Proto-Celtic
*arona
(derived)
←
Basque
arr
(cognate)
←
Occitan
arna
(cognate)
→
Catalan
arner
(affix)
→
Catalan
arnot
(suffix)
→
Occitan
arna
(cognate)